Product Description:

The E4809-770-065-A is a module in the Okuma E4809 CNC Boards series that occupies the top slot of a multi-layer amplifier stack. It functions as a servo amplifier card, delivering drive power and feedback processing for motion axes supplied by the numerical control. Installed in Okuma machining centers, this board converts digital position and velocity commands into regulated current for the attached motors and closes the loop between the SVP command source and the mechanical load.

The amplifier controls 2 independent axes, with each loop supervised by the numerical control firmware on the host. Internally, it follows the SVCII Type A hardware format, so connector placement and signal pinout match other boards in that class. A protective fuse rated at 3.2 A sits on the input rail to isolate the card if a short develops. For drive protection, the overcurrent alarm activates when load demand reaches 150% of the limit, which trips the PON line and halts the axis before devices are stressed. The torque test point is scaled at 10 V at the torque limit, allowing output verification against programmed constraints. A second monitor provides speed feedback with a scale of ±10 V at ±3750 rpm, which simplifies dynamic checks. Control data arrives from the SVP board over a differential digital bus, and the card operates as an NC-controlled amplifier.

Status information is conveyed through front-edge LEDs: the OCM lamp glows red during overcurrent, OP is yellow for a general fault, and PON lights green when power is present. Command words are received as a digital signal, which helps prevent analog drift at the interface. Two reset switches, identified as SW1-1 and SW1-2, clear faults or reload parameters without cycling cabinet mains. Field wiring is secured by M4 terminal screws, allowing ring lugs used with motor and encoder cabling to be clamped with adequate force.